Home / 28,480.38-42,720.57-18,157.74

Finding the Fourth Proportional to 28,480.38, 42,720.57 and 18,157.74

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Solution

The fourth proportional to 28,480.38, 42,720.57 and 18,157.74 is: 27,236.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.38 : 42,720.57 = 18,157.74 : x
  2. Step 2: Convert to fraction form
    28,480.38/42,720.57 = 18,157.74/x
  3. Step 3: Cross multiply
    28,480.38x = 42,720.57 × 18,157.74
  4. Step 4: Simplify right side
    28,480.38x = 775,709,002.71
  5. Step 5: Solve for x
    x = 775,709,002.71/28,480.38
  6. Step 6: Final answer
    x = 27,236.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.